Introduction to number theory lecture 39: Equivalence of binary quadratic forms

[@toaste6465]

great lecture!

[@japoco6825]

Around 9:23, what does "Improperly equivalent but not properly equivalent" mean? Isn't that trivial?

[@loupiotable]

It meand that they are equivalent if you allow base change by matrices of GLn(Z), bu not by matrices of SLn(Z)

[@migarsormrapophis2755]

yeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee